PAGE, Ariz. -- A gigantic rock slab broke off a sandstone arch at Lake Powell and smashed onto a boat, leaving one person dead and another missing.
The National Park Service said the slab, about 250 square feet in size, fell onto the bow of the boat, capsizing it.
Other boaters discovered the accident Friday, saying they had passed the craft 20 minutes earlier in Lake Canyon and had waved to the two people on board.
Rangers recovered the body of a woman